Welcome to the NavList Message Boards.


A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Add Images & Files
    Re: Taffrail log and an alternative
    From: Walter Guinon
    Date: 2002 Jun 23, 05:23 -0700

    If the clockwork presents low drag the slip of the fish is very low and the
    fish moves thru the water like a screw in wood. Thus I suggest the accuracy of
    a tafrail log is better than one percent. Unfortunately it doesn't perform so
    well in southern waters since it continually fouls with Sargasso weed.
    Don't forget to keep the fish painted black since it looks like a tasty treat
    to many of the denizens and at $40 per replacement can seriusly reduce your
    beer ration. There is a braided closline for sale that works as well as the
    "special" and costly log line sold for the purpose.
    Many paddle wheel logs are defficient at low speeds. The magnetic sensor gives
    an impulse whether rotated forward or backwards. Thus whenever the water flow
    is from aft to forward the distance traveled is incremented instead of
    decremented. To approach the same accuracy as a taffrail log one must calibrate
    for different sea conditions and headings.
    The chip log seems like a good idea if it is streamed regularly but I never
    figured out how to reteive it easily at speed due to its drag.
    Walter Guinon
    Lincolnville Maine
    Do You Yahoo!?
    Yahoo! - Official partner of 2002 FIFA World Cup

    Browse Files

    Drop Files


    What is NavList?

    Join NavList

    (please, no nicknames or handles)
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.

    Email Settings

    Posting Code:

    Custom Index

    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site